Fractographic examination of Charpy impact specimens from the HFIR-MFE-RB2 test
Description
The objective of this work is to determine the effect of low temperature irradiation in HFIR on the properties of ferritic stainless steels in order to determine the applicability of these alloys as first wall materials. Selected fracture surfaces of miniature Charpy specimens of HT-9 in base metal, weld metal and heat affected zone (HAZ) metal conditions, and 9Cr-1Mo in base metal and weld metal conditions have been examined by scanning electron microscopy following irradiation in High Flux Isotope Reactor-Magnetic Fusion Energy-RB2 at 550C to 10 dpa. Hardness measurements have also been made. Comparison of results with results on specimens irradiated to low dose demonstrates only minor changes in fracture behavior, but continued increases in hardness due to irradiation. Therefore, the mechanism controlling the degradation of impact properties does not affect the fracture path but does affect strength. A mechanism is proposed to explain the behavior based on microchemical segregation of carbide forming elements. 5 references, 10 figures, 1 table
Additional details
Publishing Information
- Imprint Title
- Fusion reactor materials: semiannual progress report for the period ending March 31, 1988
- Journal Page Range
- p. 113-121.
- Report number
- DOE/ER--0313/4
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 20027864
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY; S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Numerical Data, Progress Report
- Descriptors DEI
- CHARPY TEST; CHROMIUM STEELS; DUCTILE-BRITTLE TRANSITIONS; EXPERIMENTAL DATA; FERRITIC STEELS; FIRST WALL; FRACTURE PROPERTIES; HFIR REACTOR; PHYSICAL RADIATION EFFECTS; PROGRESS REPORT; SCANNING ELECTRON MICROSCOPY; STAINLESS STEELS; THERMONUCLEAR REACTOR MATERIAL
- Descriptors DEC
- ALLOYS; CARBON ADDITIONS; CHROMIUM ALLOYS; DATA; DESTRUCTIVE TESTING; ELECTRON MICROSCOPY; ENRICHED URANIUM REACTORS; HIGH ALLOY STEELS; IMPACT TESTS; INFORMATION; IRON ALLOYS; IRON BASE ALLOYS; IRRADIATION REACTORS; ISOTOPE PRODUCTION REACTORS; MATERIALS; MATERIALS TESTING; MECHANICAL PROPERTIES; MECHANICAL TESTS; MICROSCOPY; NUMERICAL DATA; RADIATION EFFECTS; REACTORS; RESEARCH AND TEST REACTORS; RESEARCH REACTORS; STEELS; TANK TYPE REACTORS; TEST FACILITIES; TEST REACTORS; TESTING; THERMAL REACTORS; THERMONUCLEAR REACTOR WALLS; WATER COOLED REACTORS; WATER MODERATED REACTORS